Bumping this up, i'm also having this issue as a phantom, and iv'e heard that bowmasters have it as well.
+even KMS has this issue, and they tried fixing it like 5 times already. ( so we gotta wait untill kms fixes this xD )

*here's a quote from orangemushroom, aka: max :

( he is a KMS Bowmaster )

to recap: when installing the Arrow Blaster Turret most of the times, the skill would go on a cooldown, and the turret itself would either
a. won't install
b. install, but after you walk a certain distance from it, the turret would disappear.